Heiner Gonska

University of Duisburg-Essen, Faculty of Mathematics,

Forsthausweg 2, 47057 Duisburg, Germany

E-mail:

Ioan Raşa

Technical University of Cluj-Napoca, Department of

Mathematics, Str. C. Daicoviciu, 15, RO-400020

Cluj-Napoca, România

E-mail:

Maria-Daniela Rusu

University of Duisburg-Essen, Faculty of Mathematics,

Forsthausweg 2, 47057 Duisburg, Germany

E-mail:

University of Duisburg-Essen, Faculty of Mathematics,

Forsthausweg 2, 47057 Duisburg, Germany

E-mail:

Ioan Raşa

Technical University of Cluj-Napoca, Department of

Mathematics, Str. C. Daicoviciu, 15, RO-400020

Cluj-Napoca, România

E-mail:

Maria-Daniela Rusu

University of Duisburg-Essen, Faculty of Mathematics,

Forsthausweg 2, 47057 Duisburg, Germany

E-mail:

- On stability of multicriteria investment Boolean problem with Wald's efficiency criteria
- Determining the Optimal Paths in Networks with Rated Transition Time Costs
- A note on six-dimensional planar Hermitian submanifolds of Cayley algebra
- Estimation of the extreme survival probabilities from censored data
**Chebyshev-Grüss-type inequalities via discrete oscillations**- Closure operators in the categories of modules. Part III (Operations in CO and their properties)
- On the number of group topologies on countable groups
- Invariant transformations of loop transversals. 1a. The case of automorphism